Siemens SIMATIC TI500 Especificaciones descargar pdf (Pagina 274)

Upgrading Existing Series 500 Installations

C-15

SIMATIC 545/555/575 System Manual

Table C-1 Analog/Word Output States

RBC Off/Freeze Selection

Analog/Word Module

Zero/Hold Selection

Analog/Word

Output State

Off Zero Zero *

Off Hold Last Value Last Value

Off – no selection – Last Value

Freeze Zero Last Value

Freeze Hold Last Value Last Value

Freeze – no selection – Last Value

* See the user manual of your analog/word output module for further details.

Notice that the Freeze option on the RBC overrides the Zero selection on the

analog/word output module; likewise, when Hold Last Value is selected on

the analog/word output module, that selection overrides the Off option on

the RBC jumper.

NOTE: If the RBC watchdog timer is activated (an RBC failure), the state of

the outputs is determined by the output module, with no reference to the

RBC’s Off/Freeze switch. Discrete outputs go off (to a value of zero).

Analog/word outputs obey their own Zero/Hold Last Value selection. If no

Zero/Hold Last Value selection is available on the module, the analog/word

outputs hold their last value.

NOTE: The DBC being replaced and previous models of the RBC

automatically set all discrete outputs to Off (0) and froze analog outputs

unless the output module had a ZERO/HOLD LAST VALUE option.

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Siemens SIMATIC TI500 Especificaciones Pagina 274